From 508cc0166e9a3bd8e7f81ff92ac773ade2cd9271 Mon Sep 17 00:00:00 2001
From: Alix JEUDI--LEMOINE <alix.jeudi--lemoine@etu.uca.fr>
Date: Fri, 20 Jun 2025 02:07:44 +0200
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Add=20preview=20for=20local=20files?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../drag-drop/drag-drop.component.html        |  6 +--
 .../drag-drop/drag-drop.component.ts          | 48 ++++++++++++-------
 2 files changed, 33 insertions(+), 21 deletions(-)

diff --git a/src/app/components/drag-drop/drag-drop.component.html b/src/app/components/drag-drop/drag-drop.component.html
index c3cc7ed..fa0d148 100644
--- a/src/app/components/drag-drop/drag-drop.component.html
+++ b/src/app/components/drag-drop/drag-drop.component.html
@@ -50,9 +50,9 @@
   class="mt-2 text-sm text-gray-500 dark:text-gray-400"
 >
   <ul>
-    <li *ngFor="let fileObj of fileNames" class="relative">
+    <li *ngFor="let fileObj of fileNames; let index = index; trackBy: trackByFile" class="relative" (mouseleave)="onFileNameMouseLeave()">
       <span
-        (mouseenter)="onFileNameMouseEnter(fileObj.name)"
+        (mouseenter)="onFileNameMouseEnter(fileObj)"
         class="cursor-pointer underline decoration-dotted max-w-[160px] truncate inline-block align-middle z-50"
         [title]="fileObj.name"
       >
@@ -87,7 +87,7 @@
         <span class="sr-only">Delete</span>
       </button>
       <div
-        *ngIf="hoveredFileName === fileObj.name && previewUrl"
+        *ngIf="hoveredFile?.name === fileObj.name && previewUrl"
         class="absolute top-8 left-20 z-20 border-2 border-gray-300 rounded shadow-lg"
       >
         <img
diff --git a/src/app/components/drag-drop/drag-drop.component.ts b/src/app/components/drag-drop/drag-drop.component.ts
index 85bcc17..fd3b9c3 100644
--- a/src/app/components/drag-drop/drag-drop.component.ts
+++ b/src/app/components/drag-drop/drag-drop.component.ts
@@ -19,15 +19,16 @@ import { ImageService } from '../../services/image/image.service';
 export class DragDropComponent implements OnChanges, OnDestroy {
   @Input() initialFiles: { name: string; id?: string }[] = [];
   @Input() errorMessage: string = '';
-  fileNames: { name: string; id?: string }[] = [];
   @Output() filesSelected = new EventEmitter<FileList>();
   @Output() fileRemoved = new EventEmitter<string>();
 
-  hoveredFileName: string | null = null;
+  fileNames: { name: string; id?: string }[] = [];
+  hoveredFile: { name: string; id?: string } | null = null;
   previewUrl: string | null = null;
-  private objectUrl: string | null = null;
+
   private imageUrlCache: { [id: string]: string } = {};
-  private lastHoveredId: string | null = null;
+  private imageLocalUrlCache: { [name: string]: string } = {};
+  private inputFiles: Array<File> = [];
 
   constructor(private imageService: ImageService) {}
 
@@ -47,6 +48,7 @@ export class DragDropComponent implements OnChanges, OnDestroy {
     const input = event.target as HTMLInputElement;
     if (input.files) {
       this.updateFileNames(input.files);
+      this.inputFiles = Array.from(input.files);
       this.filesSelected.emit(input.files);
     }
   }
@@ -56,6 +58,7 @@ export class DragDropComponent implements OnChanges, OnDestroy {
     event.stopPropagation();
     if (event.dataTransfer && event.dataTransfer.files) {
       this.updateFileNames(event.dataTransfer.files);
+      this.inputFiles = Array.from(event.dataTransfer.files);
       this.filesSelected.emit(event.dataTransfer.files);
     }
   }
@@ -86,21 +89,23 @@ export class DragDropComponent implements OnChanges, OnDestroy {
     }
   }
 
-  async onFileNameMouseEnter(fileName: string): Promise<void> {
-    const fileObj = this.getFileByName(fileName);
-    if (!fileObj) {
-      this.hoveredFileName = null;
+  async onFileNameMouseEnter(fileObj: { name: string; id?: string }): Promise<void> {
+    const localFile = this.inputFiles.find((f) => f.name === fileObj.name);
+
+    if (!fileObj && !localFile) {
+      this.hoveredFile = null;
       this.previewUrl = null;
-      this.lastHoveredId = null;
       return;
     }
+
     // Ne rien faire si on survole le même fichier
-    if (fileObj.id && this.lastHoveredId === fileObj.id) {
+    if(this.hoveredFile === fileObj) {
       return;
     }
-    this.hoveredFileName = fileName;
-    this.lastHoveredId = fileObj.id || null;
-    if (fileObj.id) {
+    
+    if(fileObj && fileObj.id) { // Si le fichier est dans le backend
+      this.hoveredFile = fileObj;
+
       if (this.imageUrlCache[fileObj.id]) {
         this.previewUrl = this.imageUrlCache[fileObj.id];
       } else {
@@ -110,15 +115,22 @@ export class DragDropComponent implements OnChanges, OnDestroy {
           this.previewUrl = objectUrl;
         });
       }
-    } else {
-      this.previewUrl = null;
+    } else if (localFile) { // Si le fichier est dans l'input
+      this.hoveredFile = fileObj;
+      if (!this.imageLocalUrlCache[fileObj.name]) {
+        this.imageLocalUrlCache[fileObj.name] = URL.createObjectURL(localFile);
+      }
+      this.previewUrl = this.imageLocalUrlCache[fileObj.name];
     }
   }
 
-  @HostListener('mouseleave') onFileNameMouseLeave(): void {
-    this.hoveredFileName = null;
+  onFileNameMouseLeave(): void {
+    this.hoveredFile = null;
     this.previewUrl = null;
-    this.lastHoveredId = null;
+  }
+
+  trackByFile(index: number, file: { name: string; id?: string }): string {
+    return file.id || file.name;
   }
 
   getFileByName(fileName: string): { name: string; id?: string } | undefined {